Combination tray



FIG. 1 is a perspective view of a combination tray showing my new design;

FIG. 2 is a side view thereof with the top tray separated from the bottom tray;

FIG. 3 is a top plan view of FIG. 1; and,

FIG. 4 is a bottom plan view there. 

The ornamental design for a combination tray, as shown and described. 